255755780 has 48 divisors (see below), whose sum is σ = 615377280. Its totient is φ = 87464448.

The previous prime is 255755779. The next prime is 255755813. The reversal of 255755780 is 87557552.

It is a super-2 number, since 2×255755780² = 130822038006816800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58511 + ... + 62729.

It is an arithmetic number, because the mean of its divisors is an integer number (12820360).

Almost surely, 2^255755780 is an apocalyptic number.

255755780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255755780 is an abundant number, since it is smaller than the sum of its proper divisors (359621500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255755780 is a wasteful number, since it uses less digits than its factorization.

255755780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668 (or 4666 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 44.

The square root of 255755780 is about 15992.3663039589. The cubic root of 255755780 is about 634.7584424389.

The spelling of 255755780 in words is "two hundred fifty-five million, seven hundred fifty-five thousand, seven hundred eighty".